This tunnel which is now a footpath to the NYMR engine sheds was originally built around 1834 by George Stephenson as part of the Whitby to Pickering Railway. Grosmont at the time was just known as “Tunnel”
The original carriages were horse drawn, but the the line was developed by George Hudsons’ York and North Midland Railway between 1845 and 1849, the large double track tunnel built just over a decade later shows the pace of development at that time.